106 lines
3.4 KiB
Ruby
106 lines
3.4 KiB
Ruby
# typed: false
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# frozen_string_literal: true
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require "fcntl"
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require "socket"
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module Utils
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def self.rewrite_child_error(child_error)
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error = if child_error.inner["cmd"] &&
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child_error.inner_class == ErrorDuringExecution
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ErrorDuringExecution.new(child_error.inner["cmd"],
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status: child_error.inner["status"],
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output: child_error.inner["output"])
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elsif child_error.inner["cmd"] &&
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child_error.inner_class == BuildError
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# We fill `BuildError#formula` and `BuildError#options` in later,
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# when we rescue this in `FormulaInstaller#build`.
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BuildError.new(nil, child_error.inner["cmd"],
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child_error.inner["args"], child_error.inner["env"])
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elsif child_error.inner_class == Interrupt
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Interrupt.new
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else
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# Everything other error in the child just becomes a RuntimeError.
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RuntimeError.new(child_error.message)
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end
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error.set_backtrace child_error.backtrace
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error
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end
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def self.safe_fork
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Dir.mktmpdir("homebrew", HOMEBREW_TEMP) do |tmpdir|
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UNIXServer.open("#{tmpdir}/socket") do |server|
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read, write = IO.pipe
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pid = fork do
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# bootsnap doesn't like these forked processes
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ENV["HOMEBREW_NO_BOOTSNAP"] = "1"
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ENV["HOMEBREW_ERROR_PIPE"] = server.path
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server.close
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read.close
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write.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC)
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yield
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rescue Exception => e # rubocop:disable Lint/RescueException
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error_hash = JSON.parse e.to_json
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# Special case: We need to recreate ErrorDuringExecutions
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# for proper error messages and because other code expects
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# to rescue them further down.
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if e.is_a?(ErrorDuringExecution)
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error_hash["cmd"] = e.cmd
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error_hash["status"] = if e.status.is_a?(Process::Status)
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{
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exitstatus: e.status.exitstatus,
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termsig: e.status.termsig,
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}
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else
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e.status
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end
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error_hash["output"] = e.output
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end
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write.puts error_hash.to_json
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write.close
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exit!
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else
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exit!(true)
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end
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ignore_interrupts(:quietly) do # the child will receive the interrupt and marshal it back
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begin
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socket = server.accept_nonblock
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rescue Errno::EAGAIN, Errno::EWOULDBLOCK, Errno::ECONNABORTED, Errno::EPROTO, Errno::EINTR
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retry unless Process.waitpid(T.must(pid), Process::WNOHANG)
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else
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socket.send_io(write)
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socket.close
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end
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write.close
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data = read.read
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read.close
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Process.wait(T.must(pid)) unless socket.nil?
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# 130 is the exit status for a process interrupted via Ctrl-C.
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# We handle it here because of the possibility of an interrupted process terminating
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# without writing its Interrupt exception to the error pipe.
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raise Interrupt if $CHILD_STATUS.exitstatus == 130
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if data.present?
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error_hash = JSON.parse(T.must(data.lines.first))
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e = ChildProcessError.new(error_hash)
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raise rewrite_child_error(e)
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end
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raise "Forked child process failed: #{$CHILD_STATUS}" unless $CHILD_STATUS.success?
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end
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end
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end
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end
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end
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